A whimsical, but often overlooked clock in Park Avenue.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

A bit of retro transportation flair preserved in the world's largest department store.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

There must be a pun in this haystack somewhere...

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

Hundreds of antique bank vault locks on display in New York City.

An unassuming secret door once led to a legendary watering hole.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Wine bottle sculpture with a ship's stateroom inside.

A small piece of the composer's New York home lives on in the center of Czech culture in Manhattan.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Hiroshima survivor on Riverside Drive.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

The "Seinfeld" diner.

Visit the monolithic tomb of America's most famous general.